Coffee-separator.



R. OKRASSA. COFFEE SBPARATOR.

APPLICATION FILED AUG.10, 1911.

Patented June 18, 1912.

m1 "mam PLANuuRAPH C0, WASHINGTON. n. L.

UNI"

ROBERTO OKRASSA, 0F ANTIGUA, GUATEMALA.

COFFEE-SEPARATOR.

To all whom it may concern:

Be it known that I, ROBERTO OKRASSA, a subject of the German Emperor andKing of Prussia, and residing at Antigua, Guatemala, Central America,have invented certain new and useful Improvements in Coffee-Separators,of which the following is a specification.

This invention relates to a coffee separator comprising a rotarycylinder or cylinders divided into a plurality of sections havingperforations of different size, the cylinder or cylinders being providedwith paddles, so that coffee entering the interior of the cylinder oreach cylinder is propelled along it by the paddles, and, falling throughthe different perforations into chutes, is delivered into separate bags.

The invention consists in certain features of construction hereinaftermore particularly described and pointed out in the claims.

In the accompanying drawings which illustrate a preferred embodiment ofthe invention, Figure I is an end view; Fig. II a part vertical sectionpart side elevation; Fig. III a transverse section through the line wyof Fig. II.

Referring to the drawings, the separator shown comprises two cylindersa; and b, the upper cylinder consisting of sections a a a a and a ormore, and the lower cylinder consisting of sections 5 b b 5*, b and b ormore, mounted on a suitable framework 0, and driven, in the constructionshown, by a pitch chain d. The cylinders are each supported by rollers 6arranged in pairs, one pair on the front plate of the framework 0, onwhich pair the end casting f revolves, and the other pair in the rear.Division castings g are provided, to prevent the remixing of the coffeewhich has fallen through the various sections.

A hopper h is provided at the inlet end of the upper cylinder and servesto receive the coffee which passes through the conical end casting f tothe first sect-ion a The section a is perforated in such wise that aboutone half of the incoming charge falls through, a conveyer j locatedbelow the compartment a serving to convey such portion of the charge toa chute 7:: by which it is delivered to the lower cylinder 5. Theremainder of the coffee in the upper cylinder is passed along over theperforated sections a 0: 64*, a by means of inclined paddles Z securedto longitudinal angle irons-m fas- Specification of Letters Patent.

Application filed August 10, 1911.

Patented June 18, 1912.

Serial No. 643,346..

tened to division plates n. These division plates 71, as more clearlyshown in Fig. III, are'of such form as, while retarding'the travel ofthe coffee somewhat, will permit the successful discharge of the cofieefrom one compartment to the next. The giant coffee which will not passthrough the perforations falls over the end of the cylinder a and iscaught as it issues from an opening in the end plate.

The coffee in the lower cylinder 6 is separated in a similar way and isdelivered into bags in the usual manner. The coffee from the sections aand a of the upper cylinder mingles with the coffee from the sections 5and b respectively; while the coffee from the section a of the uppercylinder mingles with the coffee which passes over the end of the lowercylinder.

In order that any coffee adhering in the perforations may be dislodgedrevolving brushes 0 are provided.

The machine shown is driven by a pulley 0 secured to the conveyer shaftj and to this shaft is secured a chain wheel which transmits its motionthrough the chain 03 to the chain wheels 9 fastened to the conical endcastings f, thus imparting a rotary motion to the separator cylinders. Aretaining roller 1" is provided to keep the lower cylinder in place,while any slackness in the chain is taken up by a weighted lever s (Fig.I) or other suitable tension device.

Owing to the fact that the cylinders a and Z) are loosely mounted on thesupport ing rollers e, the said cylinders will be jarred or vibratedmore or less as they are rotated, so as to effect a much betterseparation of the coffee than has heretofore. been obtained inseparators comprising perforated cylinders revolving in fixed bearings.

What I claim is 1. In a coffee separator, the combination with twoloosely mounted cylinders, one arranged above the other and bothrevolving on rollers, saidcylinders being divided into compartments,having perforations of different sizes, by division plates which permitthe successive discharge of the coffee from one compartment to the next,and the first or inlet compartment of the upper cylinder being soperforated as to discharge about half of the incoming coffee, areceiving compartment below said first or inlet comp-art ment of saidupper cylinder, a conveyer in said receiving compartment, and a chuteconnecting said receiving compartment with the first or inletcompartment of the lower cylinder.

2. In a coffee separator, the combination with two loosely mountedcylinders, one ar ranged above the other and both revolving on rollers,said cylinders being divided into compartments, havingperforations ofdifferent sizes, by division plates which permit the successivedischarge of the coifee from one compartment to the next, and the firstor inlet compartment of the upper cylinder being so perforated as todischarge about half of the incoming cofiee, a receiving compartmentbelow said first or inlet compartment of said upper cylinder, a conveyerin said receiving compartment, a chute connecting said receivingcompartment with the first or inlet compartment of the lower cylinder,and connections whereby the coffee discharged from certain sections ofthe upper cylinder may be mingled with the cofiee discharged fromcertain sections of the lower cylinder. In testimony whereof I havesigned my name to, this specification in the presence of two subscribingwitnesses.

ROBERTO OKRASSA. Witnesses:

AUGUsTo SCHAROTH, M. BoIssInRE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington. D. C.

